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#ifndef mathutils_INCLUDE_ONCE
#define mathutils_INCLUDE_ONCE

#include <vlCore/glsl_math.hpp>
#include <vlCore/Plane.hpp>
#include <cstdio>
#include <memory.h>
#include <vector>

namespace vl
{
  /**
   * Returns a random number N between 'min' and 'max' (included) with 53 bits of randomness generated using MersenneTwister->rand53().
   */
  VLCORE_EXPORT real random(real min, real max);

  /**
   * Returns a random number N between 'min' and 'max' (included) generated using MersenneTwister->randInt().
   */
  VLCORE_EXPORT u32 randomU32(u32 min, u32 max);

  /**
   * Returns a random number N between 'min' and 'max' (included) generated using MersenneTwister->randInt().
   */
  VLCORE_EXPORT i32 randomI32(i32 min, i32 max);

  /**
   * Returns a number N that is a power of 2 and that is equal to or greater than 'n'.
   */
  VLCORE_EXPORT int greaterEqualPow2(int n);

  /**
   * Returns a number N that is a power of 2 and that is equal to or smaller than 'n'.
   */
  VLCORE_EXPORT int smallerEqualPow2(int n);

  /**
   * Extracts the 6 frustum planes for the given model-view-projection matrix.
   */
  VLCORE_EXPORT void extractPlanes( Plane* planes, const mat4& modelviewproj );
}

#endif
